Yes, the security problem with most fintech apps is really a timing problem. The conversations about security do not happen early enough, and by the time they do, the most important decisions have already been made.
In 2024, the financial sector remained one of the most targeted industries for cyberattacks, with the average cost of a single breach reaching $6.08 million. Nearly one in five of the world's top fintech companies suffered a public breach, and almost half of those experienced repeat incidents. By January 2025, 87.5% of monitored financial services apps were reporting attacks. This is not bad luck. It is what happens when security enters the process too late.
By the time a cybersecurity expert reviews a payment platform, the fundamental decisions about how users authenticate, how data flows through the system, and how transactions are processed have already been made. Security is being asked to protect an architecture it had no hand in designing.
The decisions that matter most happen early
When a fintech product is being built, the earliest conversations are about user experience. How does someone sign up? How do they send money? What happens when a payment fails? These feel like product questions. They are also, quietly, security questions.
The onboarding flow determines what data is collected, how it is stored, and who can access it. The authentication design determines how vulnerable accounts are to takeover. The send and receive functionality determines whether transaction logic can be manipulated. Each of these decisions carries security consequences that the engineering team will have to deal with later.
Weak authentication, improper handling of session tokens, and poor access controls are among the most common vulnerabilities found in fintech platforms. But they are rarely framed as timing failures. They tend to be treated as technical oversights, discovered during security audits that happen well after the product is already built.
Speed makes it worse
Fintech moves fast. The pressure to launch, iterate and acquire users creates development cycles where security is something that gets reviewed at the end, not considered throughout. According to Verizon's 2025 Data Breach Investigations Report, the exploitation of vulnerabilities now accounts for 20% of all breaches, nearly doubling from the previous year. Many of those vulnerabilities were introduced long before the security team was ever involved.
This is not about product teams cutting corners. It is about how the process is structured. Security expertise is typically brought in to review a product once it is built, not to contribute while it is still being shaped. Reviewing a finished product and influencing one that is still being designed are completely different things. By the time a security team looks at the authentication flow, changing it meaningfully could mean rebuilding core parts of the product. So compromises get made, risks get noted, and the product ships anyway.
What actually needs to change
Research suggests that building security into a product from the start reduces vulnerabilities by up to 70% compared to modifying it later. The shift to get there is not as complicated as it sounds. Security thinking needs to enter the product conversation earlier than it typically does, not to slow things down, but to ask the right questions before decisions become expensive to undo.
What data do we actually need to collect at onboarding? How does our authentication design hold up if someone tries to get in with stolen credentials? What happens to our payment logic if a user does something we did not design for?
These are not questions that need a security engineer to answer. They are questions any product person, founder or designer can learn to ask. The gap between product and security in fintech is not mainly a technical gap. It is a communication gap and a timing problem. And timing problems, at least, are fixable.
The bigger picture
Fintech platforms handle money, identity and financial history. They deserve to be built with security as a foundation rather than something added in at the end. As the sector grows and regulators tighten their expectations around data protection and breach notification, the cost of getting this wrong is only going to increase.
The knowledge to build secure products already exists. What needs to change is when it enters the conversation. Right now, for most fintech teams, that conversation is happening one product launch too late.
